I wrote this when I tried using Deadly Arts Set. I noticed my CD wasn’t getting reset as often as I thought it would. to get the most out of this Set, you would need a high rate of attack against enemies on Pack Size Maps. a 1.8% chance out of a 100 hits with Crit Chance +60% and Deadly Strike +60% compared to 5% chance out of a 100 to get an explosion with Legend Explosion Affix. it would also be better on Builds on higher floors where monsters don’t die on the first few hits, which would give better chance for better DPS from using Deadly Arts.
adding Epiphany (5) to get Crit Chance +75% and Deadly Strike +75%, your chance to reset the Cool Down goes up to 2.8% out of a 100 hits, only a increase of 1%.
the big difference is Epiphany (5) and 3 spaces for Clearcast +75% gives 75 out of a 100 cast spells cast for free, with 0.5 second cool down when using Legend Clearcast compared to Deadly Arts (5) 1.8% out of 100 hits for finishing all Cool Downs.
using both together would take 2 spaces for +4 All Sets, 1 space Deadly Arts (5), and 2 spaces for +50% Clearcast (one of them being a Legend Clearcast), 1 Crystal Crit Chance and 2 Crystal Deadly Strike for 8 spaces.
the +75 % Clearcast takes 6 spaces. 2 for + All Sets, 1 for Epiphany (5), and 3 for the Clearcasts.
the +2.8% reset for Deadly Arts would take 9 spaces, 1 for Deadly Arts (5), 1 for Epiphany (5), 2 for +4 All Sets, 1 Crystal Crit Chance, 1 Epic Crit Chance (add 2 Death Natures for +75% Crit Chance, or you would need 2 Crystal Crit Chance), 3 Crystal Deadly Strike.
Crit DMG would take up more space of course, but I think we are just looking at the 0.5 second cool down for Clearcast vs. 1.8% cool down reset chance from Deadly Arts.